Finding the Third Proportional to 1,939,642 and 4,215,028

Step by Step Solution

1. Step 1: Write the proportion equation
   1,939,642 : 4,215,028 = 4,215,028 : x
2. Step 2: Convert to fraction form
   1,939,642/4,215,028 = 4,215,028/x
3. Step 3: Cross multiply
   1,939,642x = 4,215,028 × 4,215,028
4. Step 4: Simplify right side
   1,939,642x = 17,766,461,040,784
5. Step 5: Solve for x
   x = 17,766,461,040,784/1,939,642
6. Step 6: Final answer
   x = 9,159,659.90